Special Containment Procedures are somewhat vague. What exactly is the foundation doing? Are there social requirements for access? Do people exposed to it require a psych evaluation? How are we dealing with potential repeats of the cattle event?
Cthulu feels tacked in.

I dunno, I think they're fairly different. 1782 is pretty Lynch, while this one is just very…sad.
I think the "Azathoth with Alzheimers" thing could probably be done more…subtly (the end log pretty much shoves it in the reader's face), but as it is, it's kinda okay.

P.S.:
On second read, this thing could probably benefit from a proofread, since there's stuff like "A sensation of the interior of SCP-1406 being slightly larger than the exterior by several meters" in there…

I'm rather sad you used that picture and shopped the graffiti out, but I do like the concept.

However, the timeline of the incident seems rather muddled. You say that the grandson's surname is ██████ the first time round, but refer to him as Mr. ████ afterwards (or alternatively, they are two separate people, and you completely forget to identify or introduce Mr. ████). Mr. ████ was talking for at least half an hour before the Foundation did anything, which seems odd given they have the place under CCTV and I would assume they have security staff nearby. The entire log seems to end oddly, since you've either put the closing statement at the top of the incident report or you've completely failed to acknowledge what, if anything, the Foundation did about Mr. ████'s intrusion and what happened after the sculpture appeared.

It's possible I've badly misinterpreted what you've written down here, but I'd suggest going over it because as it stands I can't make heads or tails of what's going on in the incident.

No vote for now, and I'll change to an upvote if you either prove to me that I'm an idiot with no reading comprehension abilities, or change the incident report to be clearer on what's going on.

It hasn't always looked like a pair of deseased octopuses mating. It once a resembled a great and mighty orgy of non-Euclidean, giant octopuses, or possibly squids, spanning as far as a galaxy and being worshipped by suns.